Description
A vulnerability, which was classified as critical, has been found in MicroPython 1.21.0/1.22.0-preview. Affected by this issue is the function poll_set_add_fd of the file extmod/modselect.c. The manipulation leads to use after free. The exploit has been disclosed to the public and may be used. The patch is identified as 8b24aa36ba978eafc6114b6798b47b7bfecdca26. It is recommended to apply a patch to fix this issue. VDB-249158 is the identifier assigned to this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | MicroPython | 1.21.0, 1.22.0-preview | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | giac | No fix yet | — |
| Ubuntu 26.04 LTS | giac | No fix yet | — |
| Ubuntu 25.10 | giac | No fix yet | — |
| Ubuntu 24.04 LTS | giac | No fix yet | — |
| Ubuntu 22.04 LTS | giac | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | giac | No fix yet | — |
| Ubuntu 18.04 LTS | giac | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | micropython-copy | all versions | — | PYSEC-2023-256 |
| PyPI | micropython-io | all versions | — | PYSEC-2023-257 |
| PyPI | micropython-os | all versions | — | PYSEC-2023-258 |
| PyPI | micropython-select | all versions | — | PYSEC-2023-259 |
References
- https://vuldb.com/?id.249158 vdb-entry technical-description
- https://vuldb.com/?ctiid.249158 signature permissions-required
- https://github.com/micropython/micropython/issues/12887 exploit issue-tracking
- https://github.com/jimmo/micropython/commit/8b24aa36ba978eafc6114b6798b47b7bfecdca26 patch
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TEK46QAJOXXDZOWOIE2YACUOCZFWOBCK/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4E2HYWCZB5R4SHY4SZZZSFDMD64N4SOZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D3WWY5JY4RTJE25APB4REGDUDPATG6H7/